Silver(I)-Mediated CH Amination of 2-Alkenylanilines: Unique Solvent-Dependent Migratory Aptitude
作者:So Won Youn、Tae Yun Ko、Min Jung Jang、Su San Jang
DOI:10.1002/adsc.201400759
日期:2015.1.12
A highly effective silver(I)‐mediated CHamination of 2‐alkenylanilines has been developed to afford a diverse range of substituted indoles. High functional group tolerance, broad substrate scope, simple/fast/high‐yielding reaction, and recovery/reuse of the inexpensive silver oxidant are noteworthy. Furthermore, an uncommon migratory process of β‐monosubstituted 2‐alkenylanilines with solvent‐dependence
Divergent Syntheses of Indoles and Quinolines Involving N1–C2–C3 Bond Formation through Two Distinct Pd Catalyses
作者:Su San Jang、Young Ho Kim、So Won Youn
DOI:10.1021/acs.orglett.0c02898
日期:2020.12.4
annulative couplings of 2-alkenylanilines with aldehydes using alcohols as both the solvent and hydrogen source have been developed. These domino processes allow divergent syntheses of two significant N-heterocycles, indoles and quinolines, from the same substrate by tuning reaction parameters, which seems to invoke two distinct mechanisms. The nature of the ligand and alcoholic solvent had a profound
4-naphthoquinone derivatives, and benzo[b]acridine-6,11-diones were formed in good yields. A method has been developed for the synthesis of highly functionalized quinolines from readily available N-(2-alkenylaryl)-substituted enamines via a 6-exo-trig radicalcyclization of an imine radical. Several useful functional groups including morpholinocarbonyl, benzoyl, and cyano, are compatible with the reaction conditions
摘要 已经开发了一种方法,该方法通过亚胺基的6- exo - trig自由基环化反应,由容易获得的N-(2-链烯基芳基)-取代的烯胺合成高度官能化的喹啉。几个有用的官能团包括吗啉代羰基,苯甲酰基和氰基,与反应条件相容。在Mn(II)/ Co(II)/ O 2氧化还原体系下,这些N-(2-链烯基芳基)烯胺也有效地转化为相应的喹啉。将该策略进一步应用于相关的1,4-萘醌衍生物,并以良好的收率形成了苯并[ b ] r啶-6,11-二酮。 已经开发了一种方法,该方法通过亚胺基的6- exo - trig自由基环化反应,由容易获得的N-(2-链烯基芳基)-取代的烯胺合成高度官能化的喹啉。几个有用的官能团包括吗啉代羰基,苯甲酰基和氰基,与反应条件相容。在Mn(II)/ Co(II)/ O 2氧化还原体系下,这些N-(2-链烯基芳基)烯胺也有效地转化为相应的喹啉。将该策略进一步应用于相关的1,4-萘醌衍生物,并以良好的收率形成了苯并[
Palladium-catalysed ligand-free reductive Heck cycloisomerisation of 1,6-en-α-chloro-enamides
作者:Yangyang Hou、Jing Ma、Hongyi Yang、Edward A. Anderson、Andy Whiting、Na Wu
DOI:10.1039/c9cc00537d
日期:——
The first example of an intramolecular hydroarylation of 1,6-en-α-chloro-enamides was achieved by a palladium-catalysed ligand-free reductive Heck cycloisomerisation with no competing Heck-cyclised by-product.
synthesis of 2‐vinylanilines from the reaction of arylhydrazine hydrochlorides with alkenes and diethyl ketone via a rhodium‐catalyzed CHactivation is described. The oxidant‐free olefination reaction involves the in situ generation of an NNCR1R2 moiety as the oxidizingdirecting group thus providing an easy access to 2‐vinylanilines.